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AyAy Sir Ti-GPS?

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  • AyAy Sir Ti-GPS?

    I recently bought one of these and was curious if anyone has any experience with them? I searched, and there is no mention of them them, good or bad. They seem to be fairly new to the market, and from what I can see are of decent quality... I'll know when it arrives and I actually test it out, I suppose.

    They're built with the SIRF StarII / LP Xtrac 2.0 chipset, and claim that their design provides slightly better reception than even some StarIII receivers.. I could see it being because of the titanium baseplate, perhaps.. but again, when it arrives I'll see for sure.

    Specification


    ‧Sirf StarII/LP Xtrac 2.0 firmware
    ‧Weight : < 60g (Titanium cover, high rigid, Ultra light)
    ‧Update Rate : 1 Hz
    ‧Receiver : L1, C/A code.
    ‧Tracks up to 12 satellites.
    ‧Minimum Signal Tracked : less than -190 dBW (Ultra high sensitivity, even better than most other manufacturers' Star3 GPS receiver)
    ‧Dimension (LxWxH): 86 &#215; 54 &#215; 7 mm (Most slim GPS receiver in the world in year 2005)
    ‧Store Temperature : -45 ℃ ~ + 105 ℃
    ‧Antenna Type : Built in Patch Antenna
    ‧Operation Temperature : -40 ℃ ~ +90 ℃
    ‧Snap Start : < 3 sec (at < 25 minutes off period)
    ‧Operation Humidity : 5 % to 95 % No condensing
    ‧Power Consumption : 89~90 mA( better than most other manufacturers' StarII/LP 120~160mA ) at 4.5 - 5.5V input

    Position Accuracy


    Non DGPS (Differential GPS):
    ‧Position : 5 - 25 m CEP without SA
    ‧Velocity : 0.1m / sec
    ‧Time : 1 usec sync GPS time
    DGPS (Differential GPS):
    ‧Position : 1 - 5 m, typical
    ‧Velocity : 0.05 m / sec
    EGNOS/WAAS /Beacon:
    ‧Position : < 2.2 m, horizontal 95 % of time
    < 5 m, vertical 95 % of time

    Acquisition Time


    ‧Reacquisition 0.1 sec. averaged
    ‧Hot Start 8 sec. averaged
    ‧Warm Start 38 sec. averaged
    ‧Cold Start 45 sec. averaged

    Protocol & Interface


    ‧NMEA Protocol Output :
    Baud Rate : 4800 bps
    Data Bit : 8
    Parity : N
    Stop Bit : 1
    Output Format :
    Standard : GGA, GSA, GSV, RMC
    Optional : GGL, VTG, SiRF Binary
    ‧Interface :
    1. USB, or 2. Serial port

    Dynamic Conditions


    ‧Altitude : 18,000 m ( 60,000 feet ) max
    ‧Velocity : 515 m/sec ( 700 knots ) max
    ‧Acceleration : &#177;4G, max
    ‧Jerk : 20 m/sec, max

    LED Function


    2 backup Power on steady Ultra high light Amber
    2 backup Position ready steady Ultra high light Blue




  • #2
    After testing this GPS side by side with my Delou gps for a while, I have no hesitation in saying this is the best GPS I've ever used. (Keep in mind its only the second I've used.)

    Compared to the delou, it locks from cold much more quickly, it maintains lock much better, it has a stronger lock signal on the satelites it locks onto, and typically has about twice as many locked satelites as the delou.. especially in low signal conditions.

    I brought it inside to test it out.. I wasn't expecting much, since the delou barely sees any satelites, and never locks any of them.. even when its beside the window. What happened when I connected it up nearly made me crap my pants. I got 10 satelites in view, and it connected to 7 of them!!! This is just sitting on my bedpost beside my computer desk, which is about 12 feet from the only window in the room. It wasn't open, is regular sized, and the blind was even drawn!

    I'm really impressed with this unit, the reception is terrific, it works flawlessly, even in thick urban areas.. (I couldn't test how foilage affects it, since its winter here). The build quality of the unit is great too. Solid metal construction, the size of a credit card, and a good finish.

    I have no reservations recommending this unit to anyone.




    (I thought I should specify this is a shot taken from inside my bedroom of the locks I get.)

    Comment


    • #3
      Just got one. Let see how is it compare to the Yellow Delorme Earthmate USB (NOT LT120).
      2004 Matrix XR A7N8X-VM/400 AMD XP-M 2500+, DS-ATX
      89 Supra Turbo P3 [email protected]/Abit BE6 II, Alpine M-BUS Car2PC.
      Y2K Accord Dell GX150
      RoadRunner is the best FE PERIOD
      EmoRebellion is a SCAMMER

      Comment


      • #4
        I was pointed towards this thread when I posted this one here
        So matrix how did it go? I am not really excited to pay a non-refundable $25 s/h charge if the unit will not function well. And it is hard to get too excited with just one reccomendation, perhaps for example the unit he got was extraordinary. Anyway I am sure we would all appreciate any info you have.
        My Install

        Comment


        • #5
          It's as good as the Delorme unit. Same number of sats. I installed both of them side by side and DEEEEPPPPP inside my "plastic" dash and inside the garage with 5/6 sat at 75% vs 80% signal strength.
          I have couple screen shot but don't have time to post yet.
          2004 Matrix XR A7N8X-VM/400 AMD XP-M 2500+, DS-ATX
          89 Supra Turbo P3 [email protected]/Abit BE6 II, Alpine M-BUS Car2PC.
          Y2K Accord Dell GX150
          RoadRunner is the best FE PERIOD
          EmoRebellion is a SCAMMER

          Comment


          • #6
            I got one as well. Signal strength is good, but it takes forever and a day to lock onto sattelites. I am not really sure why. If you change computers would it slow it down? The reason I ask is that regular handheld GPS store the location where it was last turned on in the unit to speed up aquisition time. This unit does not seem to do that...
            My Install

            Comment


            • #7
              KimaX had one of these as well. I think it was a Delorme he said he had mounted near his rearview mirror and the reception was not great. This one he had in the glove compartment of his Audi! I wonder how it really compares to a SirfStar III based one, though, such as the BU353 or Holux models. Still looking at GPS receivers for my rig...
              Audio: 4 * Rainbow Audio Germs + Infinity Basslink / Case: iStarUSA S3 / CPU: C2D P8700 / MB: Jetway NC64-LF / SC: ASUS Xonar Essence STX / RAM: Crucial 2x1GB 1066MHz / HD: MTRON 2.5" 30GB / DVD: Panasonic UJ-815B / PSU: Opus 180w / LCD: Xenarc 700TSV

              Comment


              • #8
                I had mine inside car and had 12 sats locked. So reception is excellent. The startup time was b/c mine was getting intereference I will update to see if it is faster now that I moved it.
                My Install

                Comment


                • #9
                  Fusion-One:
                  is your area fairly urban? Have you tried it in a city setting yet?
                  very curious about it

                  thanks

                  Comment


                  • #10
                    I'm sure there have been a ton of threads on this, but what are the primary difference between the older Star II and Star III? Faster time to lock, better performance in city environments?

                    Comment


                    • #11
                      Originally posted by WiCKeD 5.9L
                      KimaX had one of these as well. I think it was a Delorme he said he had mounted near his rearview mirror and the reception was not great. This one he had in the glove compartment of his Audi! I wonder how it really compares to a SirfStar III based one, though, such as the BU353 or Holux models. Still looking at GPS receivers for my rig...
                      Just like Fusion-One, the only other GPS receiver I have experience with is the Deluo. I had the Deluo mounted near my rearview mirror right up against the windshield and was less than pleased with its performance. Acquisition seemed slow and once it found the satellites, the lock wasn't that great. On average, I would get a weak lock on 5-6 satellites and if I was lucky, 8-9. I moved it there because the receiver was previously located on the dashboard and had difficulty finding and locking onto satellites.

                      With the AyAy, acquisition is comparable to the Deluo. It didn't seem to be any faster or slower than the Deluo. However, once it locked onto the satellites, that is another story. It would consistently find 12 satellites and lock onto 8-9 satellites with a strong lock. When I first got the receiver and did some testing, I placed it in various areas of my car (on the dash, in the glovebox, on the passenger seat, in the center console, etc.) while I was driving and it would find and lock onto 8-9 satellites. Also, in areas of dense foliage where the Deluo would lose the satellites, the AyAy had no problem maintaing the lock on the satellites.

                      Overall, I definitely prefer the AyAy over the Deluo.

                      Kimax

                      Comment


                      • #12
                        I live in Montreal, and do plenty of city driving.. it performs well in canyons, I have no problem maintaining lock.. and have never seen it drop below 4 satelites, in the deepest parts of the city. When I pass under overpasses, if I'm going a good speed. the iguidance car icon doesn't even blink to red for that split second on me...

                        Sxott, actually.. I learned that if you power the gps down, and then power it up again at a different location, it takes much longer to attain lock.. this is because it stores its last location data in the memory, and attempts to do a quick lock with this data.. if after a minute it can't do a quick connect, it goes through a standard coldlock, which can take another minute.. so if you relocate it, it can take up to 2 minutes to relock... I've never had any problem with mine, though.. and I always park inside a parking garage.. it gets lock before I'm 100 feet out of the garage door.

                        I dunno what the differences are with sirf 2 and 3.. ayay claims to have a better sensitivity compared with some SIRF III units, so I dunno.. sirf3 is a different chipset compared with sirf2.. which definitly makes a difference, but antenna design and other stuff i dont know a thing about are to be taken into consideration as well. Maybe someone with a sirf3 could test the ayay to give us an idea of how it compares?

                        One reason I think it does so well is that the antenna has a solid titanium baseplate (the entire casing) to make a groundplate.. but I could be wrong.

                        At any rate, I'm very happy with my AyAy.

                        Comment


                        • #13
                          What is the primary difference between the USB serial interface for GPS.

                          Comment


                          • #14
                            As the promised update, yes it gets a signal quite quicky now. I am not sure exactly what the interefernce was from, I haven't yet checked if the CD player will interfere (as it is on top of the head unit hidden out of site), but when using the line in on the HU (which is all I really use) there is no intereference and it is very awesome. I have a WRX and the HU on the top, and the AyAy is so nice and slim it slipped right under the gauge pod, no one will no it is there, and if I take the faceplate hopefully no one will want the HU enough to find out it exists
                            My Install

                            Comment


                            • #15
                              Just wanted to give an update on the AyAy after using it for a month.

                              Similar to sxott, when I first started using the receiver, acquisition times seemed to be a bit slow. Now it seems to be much, much faster. When starting iGuidance, the receiver will lock onto 8-9 sats instantly (and even before the GPS Info window appears). However, coming out of hibernation, it takes a good 5-10 seconds to get a lock. I'm not sure what caused the slow acquisition times earlier, but it's much faster now.

                              I'm also amazed at how sensitive the receiver is. It will maintain a lock when I pass under bridges and even while stopped at a red light under a bridge, the AyAy maintained a pretty strong lock on 5 satellites (and this is with the receiver in my glovebox).

                              Like Fusion-One, I have no reservations recommending this unit.

                              KimaX

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